2009-05-19_REVISION - M1981021 (27)

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ENERGYLABORATOR/ES, INC -2393 Salt Creek Highway (82601) • P.O. Box 3258 • Casper WY82602 Toll Free 8882350515 - 307235.0515 -Fax 307234.1639 - casper(9e17ergy1ab. com • www. energy/ab.com QA/QC Summary Report Client: Denison Mines (USA) Corp Report Date: 01/26/09 Project: Sunday Mines Attenuation Tests - 68838 Work Order: C09010051 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method: E200.8 Batch: R113238 Sample ID: LRB 6 Method Blank Run: ICPMS4-C_090108A 01/08/09 15:20 Antimony 0.0006 mg/L 0.0003 Arsenic ND mg/L 2E-05 Molybdenum 5E-05 mg/L 3E-05 Selenium ND mg/L 4E-05 Uranium 8E-06 mg/L 7E-06 Vanadium ND mg/L 7E-06 Sample ID: LFB 6 Laboratory Fortified Blank Run: ICPMS4-C_090108A 01/08/09 15:27 Antimony 0.0491 mg/L 0.0010 97 85 115 Arsenic 0.0501 mg/L 0.0010 100 85 115 Molybdenum 0.0506 mg/L 0.0010 101 85 115 Selenium 0.0508 mg/L 0.0010 102 85 115 Uranium 0.0492 mg/L 0.00030 98 85 115 Vanadium 0.0498 mg/L 0.0010 100 85 115 Sample ID: C09010051-004BMS4 6 Sample Matrix Spike Run: ICPMS4-C_090108A 01/08/09 19:43 Antimony 0.0557 mg/L 0.050 108 70 130 Arsenic 0.114 mg/L 0.0010 105 70 130 Molybdenum 1.60 mg/L 0.10 70 130 A Selenium 3.37 mg/L 0.0010 70 130 A Uranium 0.0584 mg/L 0.00030 103 70 130 Vanadium 4.84 mg/L 0.10 70 130 A Sample ID: C09010051-004BMSD 6 Sample Matrix Spike Duplicate Run: ICPMS4-C_090108A 01/08109 19:49 Antimony 0.0565 mg/L 0.050 109 70 130 1.4 20 Arsenic 0.115 mg/L 0.0010 107 70 130 0.5 20 Molybdenum 1.60 mg/L 0.10 70 130 0.1 20 A Selenium 3.38 mg/L 0.0010 70 130 0.2 20 A Uranium 0.0586 mg/L 0.00030 103 70 130 0.4 20 Vanadium 4.86 mg/L 0.10 70 130 0.5 20 A Qualifiers: RL - Analyte reporting limit. A - The analyte level was greater than four times the spike level. In accordance with the method % recovery is not calculated. • • 0 ND - Not detected at the reporting limit.